Pre-Algebra Examples

$\frac{9 (2 w + 7) (w - 5)}{45 (w - 5) (3 w + 7)}$

Step 1

Expand $9 (2 w + 7) (w - 5)$ .

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Step 1.1

Apply the distributive property.

$\frac{(9 (2 w) + 9 \cdot 7) (w - 5)}{45 (w - 5) (3 w + 7)}$

Step 1.2

Apply the distributive property.

$\frac{9 (2 w) (w - 5) + 9 \cdot (7 (w - 5))}{45 (w - 5) (3 w + 7)}$

Step 1.3

Apply the distributive property.

$\frac{9 (2 w) w + 9 (2 w) \cdot - 5 + 9 \cdot (7 (w - 5))}{45 (w - 5) (3 w + 7)}$

Step 1.4

Apply the distributive property.

$\frac{9 (2 w) w + 9 (2 w) \cdot - 5 + 9 \cdot (7 w) + 9 \cdot 7 \cdot - 5}{45 (w - 5) (3 w + 7)}$

Step 1.5

Remove parentheses.

$\frac{9 \cdot (2 w \cdot w) + 9 (2 w) \cdot - 5 + 9 \cdot (7 w) + 9 \cdot 7 \cdot - 5}{45 (w - 5) (3 w + 7)}$

Step 1.6

Remove parentheses.

$\frac{9 \cdot (2 w \cdot w) + 9 \cdot (2 w) \cdot - 5 + 9 \cdot (7 w) + 9 \cdot 7 \cdot - 5}{45 (w - 5) (3 w + 7)}$

Step 1.7

Move $w$ .

$\frac{9 \cdot (2 w \cdot w) + 9 \cdot 2 \cdot (- 5 w) + 9 \cdot (7 w) + 9 \cdot 7 \cdot - 5}{45 (w - 5) (3 w + 7)}$

Step 1.8

Multiply $9$ by $2$ .

$\frac{18 w \cdot w + 9 \cdot 2 \cdot (- 5 w) + 9 \cdot (7 w) + 9 \cdot 7 \cdot - 5}{45 (w - 5) (3 w + 7)}$

Step 1.9

Raise $w$ to the power of $1$ .

$\frac{18 (w \cdot w) + 9 \cdot 2 \cdot (- 5 w) + 9 \cdot (7 w) + 9 \cdot 7 \cdot - 5}{45 (w - 5) (3 w + 7)}$

Step 1.10

Raise $w$ to the power of $1$ .

$\frac{18 (w \cdot w) + 9 \cdot 2 \cdot (- 5 w) + 9 \cdot (7 w) + 9 \cdot 7 \cdot - 5}{45 (w - 5) (3 w + 7)}$

Step 1.11

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$\frac{18 w^{1 + 1} + 9 \cdot 2 \cdot (- 5 w) + 9 \cdot (7 w) + 9 \cdot 7 \cdot - 5}{45 (w - 5) (3 w + 7)}$

Step 1.12

Add $1$ and $1$ .

$\frac{18 w^{2} + 9 \cdot 2 \cdot (- 5 w) + 9 \cdot (7 w) + 9 \cdot 7 \cdot - 5}{45 (w - 5) (3 w + 7)}$

Step 1.13

Multiply $9$ by $2$ .

$\frac{18 w^{2} + 18 \cdot (- 5 w) + 9 \cdot (7 w) + 9 \cdot 7 \cdot - 5}{45 (w - 5) (3 w + 7)}$

Step 1.14

Multiply $18$ by $- 5$ .

$\frac{18 w^{2} - 90 w + 9 \cdot (7 w) + 9 \cdot 7 \cdot - 5}{45 (w - 5) (3 w + 7)}$

Step 1.15

Multiply $9$ by $7$ .

$\frac{18 w^{2} - 90 w + 63 w + 9 \cdot 7 \cdot - 5}{45 (w - 5) (3 w + 7)}$

Step 1.16

Multiply $9$ by $7$ .

$\frac{18 w^{2} - 90 w + 63 w + 63 \cdot - 5}{45 (w - 5) (3 w + 7)}$

Step 1.17

Multiply $63$ by $- 5$ .

$\frac{18 w^{2} - 90 w + 63 w - 315}{45 (w - 5) (3 w + 7)}$

Step 1.18

Add $- 90 w$ and $63 w$ .

$\frac{18 w^{2} - 27 w - 315}{45 (w - 5) (3 w + 7)}$

Step 2

Expand $45 (w - 5) (3 w + 7)$ .

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Step 2.1

Apply the distributive property.

$\frac{18 w^{2} - 27 w - 315}{(45 w + 45 \cdot - 5) (3 w + 7)}$

Step 2.2

Apply the distributive property.

$\frac{18 w^{2} - 27 w - 315}{45 w (3 w + 7) + 45 \cdot (- 5 (3 w + 7))}$

Step 2.3

Apply the distributive property.

$\frac{18 w^{2} - 27 w - 315}{45 w (3 w) + 45 w \cdot 7 + 45 \cdot (- 5 (3 w + 7))}$

Step 2.4

Apply the distributive property.

$\frac{18 w^{2} - 27 w - 315}{45 w (3 w) + 45 w \cdot 7 + 45 \cdot (- 5 (3 w)) + 45 \cdot - 5 \cdot 7}$

Step 2.5

Remove parentheses.

$\frac{18 w^{2} - 27 w - 315}{45 w \cdot (3 w) + 45 w \cdot 7 + 45 \cdot (- 5 (3 w)) + 45 \cdot - 5 \cdot 7}$

Step 2.6

Move $w$ .

$\frac{18 w^{2} - 27 w - 315}{45 \cdot (3 w \cdot w) + 45 w \cdot 7 + 45 \cdot (- 5 (3 w)) + 45 \cdot - 5 \cdot 7}$

Step 2.7

Move $w$ .

$\frac{18 w^{2} - 27 w - 315}{45 \cdot (3 w \cdot w) + 45 \cdot (7 w) + 45 \cdot (- 5 (3 w)) + 45 \cdot - 5 \cdot 7}$

Step 2.8

Remove parentheses.

$\frac{18 w^{2} - 27 w - 315}{45 \cdot (3 w \cdot w) + 45 \cdot (7 w) + 45 \cdot - 5 \cdot (3 w) + 45 \cdot - 5 \cdot 7}$

Step 2.9

Multiply $45$ by $3$ .

$\frac{18 w^{2} - 27 w - 315}{135 w \cdot w + 45 \cdot (7 w) + 45 \cdot - 5 \cdot (3 w) + 45 \cdot - 5 \cdot 7}$

Step 2.10

Raise $w$ to the power of $1$ .

$\frac{18 w^{2} - 27 w - 315}{135 (w \cdot w) + 45 \cdot (7 w) + 45 \cdot - 5 \cdot (3 w) + 45 \cdot - 5 \cdot 7}$

Step 2.11

Raise $w$ to the power of $1$ .

$\frac{18 w^{2} - 27 w - 315}{135 (w \cdot w) + 45 \cdot (7 w) + 45 \cdot - 5 \cdot (3 w) + 45 \cdot - 5 \cdot 7}$

Step 2.12

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$\frac{18 w^{2} - 27 w - 315}{135 w^{1 + 1} + 45 \cdot (7 w) + 45 \cdot - 5 \cdot (3 w) + 45 \cdot - 5 \cdot 7}$

Step 2.13

Add $1$ and $1$ .

$\frac{18 w^{2} - 27 w - 315}{135 w^{2} + 45 \cdot (7 w) + 45 \cdot - 5 \cdot (3 w) + 45 \cdot - 5 \cdot 7}$

Step 2.14

Multiply $45$ by $7$ .

$\frac{18 w^{2} - 27 w - 315}{135 w^{2} + 315 w + 45 \cdot - 5 \cdot (3 w) + 45 \cdot - 5 \cdot 7}$

Step 2.15

Multiply $45$ by $- 5$ .

$\frac{18 w^{2} - 27 w - 315}{135 w^{2} + 315 w - 225 \cdot (3 w) + 45 \cdot - 5 \cdot 7}$

Step 2.16

Multiply $- 225$ by $3$ .

$\frac{18 w^{2} - 27 w - 315}{135 w^{2} + 315 w - 675 w + 45 \cdot - 5 \cdot 7}$

Step 2.17

Multiply $45$ by $- 5$ .

$\frac{18 w^{2} - 27 w - 315}{135 w^{2} + 315 w - 675 w - 225 \cdot 7}$

Step 2.18

Multiply $- 225$ by $7$ .

$\frac{18 w^{2} - 27 w - 315}{135 w^{2} + 315 w - 675 w - 1575}$

Step 2.19

Subtract $675 w$ from $315 w$ .

$\frac{18 w^{2} - 27 w - 315}{135 w^{2} - 360 w - 1575}$

Step 3

Set up the polynomials to be divided. If there is not a term for every exponent, insert one with a value of $0$ .

$135 w^{2}$

$360 w$

$1575$

$18 w^{2}$

$27 w$

$315$

Step 4

Divide the highest order term in the dividend $18 w^{2}$ by the highest order term in divisor $135 w^{2}$ .

							$\frac{2}{15}$
	$135 w^{2}$	-	$360 w$	-	$1575$		$18 w^{2}$	-	$27 w$	-	$315$

Step 5

Multiply the new quotient term by the divisor.

						$\frac{2}{15}$
$135 w^{2}$	-	$360 w$	-	$1575$		$18 w^{2}$	-	$27 w$	-	$315$
					+	$18 w^{2}$	-	$48 w$	-	$210$

Step 6

The expression needs to be subtracted from the dividend, so change all the signs in $18 w^{2} - 48 w - 210$

						$\frac{2}{15}$
$135 w^{2}$	-	$360 w$	-	$1575$		$18 w^{2}$	-	$27 w$	-	$315$
					-	$18 w^{2}$	+	$48 w$	+	$210$

Step 7

After changing the signs, add the last dividend from the multiplied polynomial to find the new dividend.

						$\frac{2}{15}$
$135 w^{2}$	-	$360 w$	-	$1575$		$18 w^{2}$	-	$27 w$	-	$315$
					-	$18 w^{2}$	+	$48 w$	+	$210$
							+	$21 w$	-	$105$

Step 8

The final answer is the quotient plus the remainder over the divisor.

$\frac{2}{15} + \frac{21 w - 105}{135 w^{2} - 360 w - 1575}$